420 Dr. F. Briiggemann on Stony Corals in 



pointed out by Milne-Edwards. It is distinguished from all 

 its allies by the very obtuse tops of the branches. 



Hob. Red Sea {Ehrenherg) ^ Tur near Sinai {Rachel) ; 

 Singapore {Dana) j Sooloo Sea {Dana) . 



7. Seriato^ora valida. 

 Seriatopora valida, Ehrenberg, M. -Edwards, 



To judge from the descriptions, this seems to be very near 

 to 8. caliendrum. From the following species it differs in 

 having the branches crowded and often coalescing, thecalicles 

 small, and the surface of the coenenchyma granulate. 



8. Seriatopora Gilntheri. B.M. 



Corallum fasciculate, but rather lax on account of the scarce 

 ramification of the principal branches, nearly spherical in 

 general outline. Branches slender, gradually tapering, rarely 

 coalescing at the base ; angles of ramification very acute, on 

 the average 30"-40°. Terminal branchlets long, slender, subu- 

 late, six-winged at the summit. Calicles extremely crowded, 

 disposed in regular series, those of the same row touching each 

 other ; the interspaces between the rows narrow, distance 

 generally much less than one half of the diameter of the 

 calicles. Cells large, circular, placed somewhat obliquely, but 

 only slightly vaulted ; their edges not very prominent, fim- 

 briate. Septa entirely obsolete. Columella well developed, 

 thin, lamelliform. Surface of coenenchyma strongly echinulate. 

 Diameter of principal branches, on the average, 4 millims., 

 of calicles 1 millim. 



Hah. New Guinea. 



This elegant species, to which I have the pleasure of at- 

 taching Dr. Gllnther's name, has a peculiar aspect on account 

 of its mode of growth, as well as of its crowded, large, 

 and open cells, the latter being rather ocelliform in their 

 general appearance. This combination of characters serves to 

 distinguish it readily from all the allied species. 



9. Seriatopora elegans. B.M. 



Seriatopora " subulata" M. -Edwards, Atl. Eegn. Anim. Cuv., Zooph. 



pi. 81. fig. 2. 

 " Pocillopora acuta,^^ M.-Edwards, Hist. Nat. Cor. Atlas, p, 11, pi, F4. 



Seriatopora elegans, M.-Edwards, op. cit. vol, iii. p. 312, 

 This is one of the best-marked species. Its principal cha- 

 racters are in the thick, slender, pointed, and not much ramified 

 branches, the large and vaulted calicles, which are distinctly 

 seriate only towards the apical parts of the branches, the very 



